Compare NDF831 with NDF820 (2)

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	Messoa NDF831	Messoa NDF820
	Contact manufacturer	Contact manufacturer
Chip Inch Size	1/3	1/3
Colour Type	Colour	Colour
Resolution TVL	1280x 960	--
Sensitivity lux	0.5	0.1
Pan Speed ^o/ sec	350	--
Digital (DSP)	✔	--
Tilt Speed ^o/ sec	150	--
Indoor/Outdoor	Indoor/Outdoor	--
Voltage	12V DC / 24 V AC, PoE	24 V AC, 12 V DC
Focal length	3 ~ 9	4
Rotation Angles^o	31.8 ~ 90 (H) x 23.9 ~ 66.2	--
Compression	M-JPEG, JPEG, MPEG-4	H.264, MPEG4, Motion JPEG
Back Light Compensation	✔	✔
Auto Gain Control	✔	✔
White Balance	✔	✔
Electronic Shutter range	1/30; Support long shutter 1/7.5~4	1/10000 ~ 1/3.75
Synchronisation	Internal	Internal
Signal Mode	PAL/NTSC	PAL/NTSC
Built-in IR LED	✔	--

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